Determine whether the site is WSS (3.0) or MOSS Enterprise

There is no way to actually know whether a site is hosted on a server that has Microsoft Office SharePoint Server (MOSS) installed by just looking at it.The differences are mostly behind the scenes and are not visible to users. Customizations may cause a WSS site to look as if it has some extensions that come with MOSS or might cause a MOSS site to look simpler by removing the MOSS specific links that would help you identify a site as MOSS.

There are two things you can look for in any SharePoint site and be fairly sure that your site is MOSS or WSS. The first is to look for the My Site link at the top of the screen.If you have that link,it means you are viewing a site that is running on a server with MOSS.Not having the link does not necessarily mean that the site does have MOSS because the administrator can choose to disable that functionality.

The second way you can tell is by looking for the Advanced Search link. WSS site (unless customized)do not have that link,so having that link means you you probably are viewing a site that is running on a server with MOSS. Another related way to test this is to open the search screen (perform a search) and see whether you have the option from that screen to switch to advanced search.

One of the main differences between WSS and MOSS is the Web Parts available; the list below shows those Web Parts which are not present in WSS 3.0

Contact Details
Business Data Actions
Business Data Item
Business Data Item Builder
Business Data List Business Data Related List
Excel Web Access
IView Web Part
WSRP Consumer Web Part
Site Aggregator
Key Performance Indicators
KPI Details
Content Query Web Parts
I need to…
RSS Viewer
Summary Link Web Part
Table of Contents Web Part
This Week in Pictures
Business Data Catalog
Filter
Choice Filter
Current User Filter
Date Filter
Filter Actions
Page Field Filter
Query String (URL)
Filter
SharePoint List Filter
SQL Server 2005 Analysis Services Filter
Text Filter
My Calendar
My Contacts
My Inbox
My Mail Folder
My Tasks
Advanced Search Box
People Search Box
People Search Core
Results
Search Action Links
Search Best Bets
Search Box
Search Core Results
Search High Confidence Results
Search Paging
Search Statistics
Search Summary
Categories
Sites in Categories
Top Sites